The Hulk does all of Bruce's letting loose for him.

And this is weird. He's seen Tony after a few drinks, and he knows the reputation of the old Tony Stark, but the Tony he's known has never been just straight up shitfaced. The only good thing he can say about it so far is that at least shitfaced Tony is congenial instead of angry, but angry or weepy could be just around the corner. It isn't a thought that's conducive to relaxing and enjoying himself.

"I'm fine. I'm good." He puts a good face on it. "I'm on an alien planet with my friend." And no one's trying to kill them yet. Such fun.